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converting block states to a bitfield

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MihailRis 2024-05-31 11:13:36 +03:00
parent 5dd06b233e
commit 6d933ac263
17 changed files with 197 additions and 164 deletions
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37
src/voxels/voxel.hpp
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@ -10,22 +10,33 @@ inline constexpr int BLOCK_DIR_EAST = 0x3;
inline constexpr int BLOCK_DIR_UP = 0x4;
inline constexpr int BLOCK_DIR_DOWN = 0x5;
// limited to 8 block orientations
inline constexpr int BLOCK_ROT_MASK = 0b0000'0111;
// reserved bits
inline constexpr int BLOCK_RESERVED_MASK = 0b1111'1000;
struct blockstate {
uint8_t rotation : 3;
uint8_t segment : 2;
uint8_t reserved : 3;
uint8_t userbits : 8;
};
static_assert (sizeof(blockstate) == 2);
inline constexpr blockstate_t blockstate2int(blockstate b) {
return b.rotation |
(b.segment << 3) |
(b.reserved << 5) |
(b.userbits << 8);
}
inline constexpr blockstate int2blockstate(blockstate_t i) {
return {
static_cast<uint8_t>(i & 0b111),
static_cast<uint8_t>((i >> 3) & 0b11),
static_cast<uint8_t>((i >> 5) & 0b111),
static_cast<uint8_t>((i >> 8) & 0xFF)
};
}
struct voxel {
blockid_t id;
blockstate_t states;
inline uint8_t rotation() const {
return states & BLOCK_ROT_MASK;
}
inline void setRotation(uint8_t rotation) {
states = (states & (~BLOCK_ROT_MASK)) | (rotation & BLOCK_ROT_MASK);
}
blockstate state;
};
#endif // VOXELS_VOXEL_HPP_